Andy Hertzfeld, one of the fathers of Macintosh, writes about how "OK" became the universal "go ahead and do this" interface language for modern computers. The reason might surprise you, or at least make you laugh. For a less amusing exercise, search your own work for "click OK" and ask yourself if your readers still need to be told to do that after more than 30 years.

Sadly, the "Huh?" button introduced more than a decade later in Apple Guide failed to catch on.